configs: Fix stat names after switchable changes

b6e0e72d9 changed the names of the switchable processor cores. This
change updates the stats after the nightlies failed.

Change-Id: If349ff07dea08ad3999e02ee95da389bab903b3e
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/62791
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
3 files changed